This commit is contained in:
Stephen Franceschelli 2019-07-30 13:41:05 -04:00
parent 596a6da241
commit c1a589c5b6
7078 changed files with 1882834 additions and 319 deletions

361
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'use strict';
const path = require('path');
const childProcess = require('child_process');
const crossSpawn = require('cross-spawn');
const stripEof = require('strip-eof');
const npmRunPath = require('npm-run-path');
const isStream = require('is-stream');
const _getStream = require('get-stream');
const pFinally = require('p-finally');
const onExit = require('signal-exit');
const errname = require('./lib/errname');
const stdio = require('./lib/stdio');
const TEN_MEGABYTES = 1000 * 1000 * 10;
function handleArgs(cmd, args, opts) {
let parsed;
opts = Object.assign({
extendEnv: true,
env: {}
}, opts);
if (opts.extendEnv) {
opts.env = Object.assign({}, process.env, opts.env);
}
if (opts.__winShell === true) {
delete opts.__winShell;
parsed = {
command: cmd,
args,
options: opts,
file: cmd,
original: {
cmd,
args
}
};
} else {
parsed = crossSpawn._parse(cmd, args, opts);
}
opts = Object.assign({
maxBuffer: TEN_MEGABYTES,
buffer: true,
stripEof: true,
preferLocal: true,
localDir: parsed.options.cwd || process.cwd(),
encoding: 'utf8',
reject: true,
cleanup: true
}, parsed.options);
opts.stdio = stdio(opts);
if (opts.preferLocal) {
opts.env = npmRunPath.env(Object.assign({}, opts, {cwd: opts.localDir}));
}
if (opts.detached) {
// #115
opts.cleanup = false;
}
if (process.platform === 'win32' && path.basename(parsed.command) === 'cmd.exe') {
// #116
parsed.args.unshift('/q');
}
return {
cmd: parsed.command,
args: parsed.args,
opts,
parsed
};
}
function handleInput(spawned, input) {
if (input === null || input === undefined) {
return;
}
if (isStream(input)) {
input.pipe(spawned.stdin);
} else {
spawned.stdin.end(input);
}
}
function handleOutput(opts, val) {
if (val && opts.stripEof) {
val = stripEof(val);
}
return val;
}
function handleShell(fn, cmd, opts) {
let file = '/bin/sh';
let args = ['-c', cmd];
opts = Object.assign({}, opts);
if (process.platform === 'win32') {
opts.__winShell = true;
file = process.env.comspec || 'cmd.exe';
args = ['/s', '/c', `"${cmd}"`];
opts.windowsVerbatimArguments = true;
}
if (opts.shell) {
file = opts.shell;
delete opts.shell;
}
return fn(file, args, opts);
}
function getStream(process, stream, {encoding, buffer, maxBuffer}) {
if (!process[stream]) {
return null;
}
let ret;
if (!buffer) {
// TODO: Use `ret = util.promisify(stream.finished)(process[stream]);` when targeting Node.js 10
ret = new Promise((resolve, reject) => {
process[stream]
.once('end', resolve)
.once('error', reject);
});
} else if (encoding) {
ret = _getStream(process[stream], {
encoding,
maxBuffer
});
} else {
ret = _getStream.buffer(process[stream], {maxBuffer});
}
return ret.catch(err => {
err.stream = stream;
err.message = `${stream} ${err.message}`;
throw err;
});
}
function makeError(result, options) {
const {stdout, stderr} = result;
let err = result.error;
const {code, signal} = result;
const {parsed, joinedCmd} = options;
const timedOut = options.timedOut || false;
if (!err) {
let output = '';
if (Array.isArray(parsed.opts.stdio)) {
if (parsed.opts.stdio[2] !== 'inherit') {
output += output.length > 0 ? stderr : `\n${stderr}`;
}
if (parsed.opts.stdio[1] !== 'inherit') {
output += `\n${stdout}`;
}
} else if (parsed.opts.stdio !== 'inherit') {
output = `\n${stderr}${stdout}`;
}
err = new Error(`Command failed: ${joinedCmd}${output}`);
err.code = code < 0 ? errname(code) : code;
}
err.stdout = stdout;
err.stderr = stderr;
err.failed = true;
err.signal = signal || null;
err.cmd = joinedCmd;
err.timedOut = timedOut;
return err;
}
function joinCmd(cmd, args) {
let joinedCmd = cmd;
if (Array.isArray(args) && args.length > 0) {
joinedCmd += ' ' + args.join(' ');
}
return joinedCmd;
}
module.exports = (cmd, args, opts) => {
const parsed = handleArgs(cmd, args, opts);
const {encoding, buffer, maxBuffer} = parsed.opts;
const joinedCmd = joinCmd(cmd, args);
let spawned;
try {
spawned = childProcess.spawn(parsed.cmd, parsed.args, parsed.opts);
} catch (err) {
return Promise.reject(err);
}
let removeExitHandler;
if (parsed.opts.cleanup) {
removeExitHandler = onExit(() => {
spawned.kill();
});
}
let timeoutId = null;
let timedOut = false;
const cleanup = () => {
if (timeoutId) {
clearTimeout(timeoutId);
timeoutId = null;
}
if (removeExitHandler) {
removeExitHandler();
}
};
if (parsed.opts.timeout > 0) {
timeoutId = setTimeout(() => {
timeoutId = null;
timedOut = true;
spawned.kill(parsed.opts.killSignal);
}, parsed.opts.timeout);
}
const processDone = new Promise(resolve => {
spawned.on('exit', (code, signal) => {
cleanup();
resolve({code, signal});
});
spawned.on('error', err => {
cleanup();
resolve({error: err});
});
if (spawned.stdin) {
spawned.stdin.on('error', err => {
cleanup();
resolve({error: err});
});
}
});
function destroy() {
if (spawned.stdout) {
spawned.stdout.destroy();
}
if (spawned.stderr) {
spawned.stderr.destroy();
}
}
const handlePromise = () => pFinally(Promise.all([
processDone,
getStream(spawned, 'stdout', {encoding, buffer, maxBuffer}),
getStream(spawned, 'stderr', {encoding, buffer, maxBuffer})
]).then(arr => {
const result = arr[0];
result.stdout = arr[1];
result.stderr = arr[2];
if (result.error || result.code !== 0 || result.signal !== null) {
const err = makeError(result, {
joinedCmd,
parsed,
timedOut
});
// TODO: missing some timeout logic for killed
// https://github.com/nodejs/node/blob/master/lib/child_process.js#L203
// err.killed = spawned.killed || killed;
err.killed = err.killed || spawned.killed;
if (!parsed.opts.reject) {
return err;
}
throw err;
}
return {
stdout: handleOutput(parsed.opts, result.stdout),
stderr: handleOutput(parsed.opts, result.stderr),
code: 0,
failed: false,
killed: false,
signal: null,
cmd: joinedCmd,
timedOut: false
};
}), destroy);
crossSpawn._enoent.hookChildProcess(spawned, parsed.parsed);
handleInput(spawned, parsed.opts.input);
spawned.then = (onfulfilled, onrejected) => handlePromise().then(onfulfilled, onrejected);
spawned.catch = onrejected => handlePromise().catch(onrejected);
return spawned;
};
// TODO: set `stderr: 'ignore'` when that option is implemented
module.exports.stdout = (...args) => module.exports(...args).then(x => x.stdout);
// TODO: set `stdout: 'ignore'` when that option is implemented
module.exports.stderr = (...args) => module.exports(...args).then(x => x.stderr);
module.exports.shell = (cmd, opts) => handleShell(module.exports, cmd, opts);
module.exports.sync = (cmd, args, opts) => {
const parsed = handleArgs(cmd, args, opts);
const joinedCmd = joinCmd(cmd, args);
if (isStream(parsed.opts.input)) {
throw new TypeError('The `input` option cannot be a stream in sync mode');
}
const result = childProcess.spawnSync(parsed.cmd, parsed.args, parsed.opts);
result.code = result.status;
if (result.error || result.status !== 0 || result.signal !== null) {
const err = makeError(result, {
joinedCmd,
parsed
});
if (!parsed.opts.reject) {
return err;
}
throw err;
}
return {
stdout: handleOutput(parsed.opts, result.stdout),
stderr: handleOutput(parsed.opts, result.stderr),
code: 0,
failed: false,
signal: null,
cmd: joinedCmd,
timedOut: false
};
};
module.exports.shellSync = (cmd, opts) => handleShell(module.exports.sync, cmd, opts);

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'use strict';
// Older verions of Node.js might not have `util.getSystemErrorName()`.
// In that case, fall back to a deprecated internal.
const util = require('util');
let uv;
if (typeof util.getSystemErrorName === 'function') {
module.exports = util.getSystemErrorName;
} else {
try {
uv = process.binding('uv');
if (typeof uv.errname !== 'function') {
throw new TypeError('uv.errname is not a function');
}
} catch (err) {
console.error('execa/lib/errname: unable to establish process.binding(\'uv\')', err);
uv = null;
}
module.exports = code => errname(uv, code);
}
// Used for testing the fallback behavior
module.exports.__test__ = errname;
function errname(uv, code) {
if (uv) {
return uv.errname(code);
}
if (!(code < 0)) {
throw new Error('err >= 0');
}
return `Unknown system error ${code}`;
}

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'use strict';
const alias = ['stdin', 'stdout', 'stderr'];
const hasAlias = opts => alias.some(x => Boolean(opts[x]));
module.exports = opts => {
if (!opts) {
return null;
}
if (opts.stdio && hasAlias(opts)) {
throw new Error(`It's not possible to provide \`stdio\` in combination with one of ${alias.map(x => `\`${x}\``).join(', ')}`);
}
if (typeof opts.stdio === 'string') {
return opts.stdio;
}
const stdio = opts.stdio || [];
if (!Array.isArray(stdio)) {
throw new TypeError(`Expected \`stdio\` to be of type \`string\` or \`Array\`, got \`${typeof stdio}\``);
}
const result = [];
const len = Math.max(stdio.length, alias.length);
for (let i = 0; i < len; i++) {
let value = null;
if (stdio[i] !== undefined) {
value = stdio[i];
} else if (opts[alias[i]] !== undefined) {
value = opts[alias[i]];
}
result[i] = value;
}
return result;
};

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MIT License
Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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{
"_from": "execa@^1.0.0",
"_id": "execa@1.0.0",
"_inBundle": false,
"_integrity": "sha512-adbxcyWV46qiHyvSp50TKt05tB4tK3HcmF7/nxfAdhnox83seTDbwnaqKO4sXRy7roHAIFqJP/Rw/AuEbX61LA==",
"_location": "/execa",
"_phantomChildren": {},
"_requested": {
"type": "range",
"registry": true,
"raw": "execa@^1.0.0",
"name": "execa",
"escapedName": "execa",
"rawSpec": "^1.0.0",
"saveSpec": null,
"fetchSpec": "^1.0.0"
},
"_requiredBy": [
"/husky",
"/jest-changed-files",
"/os-locale",
"/sane"
],
"_resolved": "https://registry.npmjs.org/execa/-/execa-1.0.0.tgz",
"_shasum": "c6236a5bb4df6d6f15e88e7f017798216749ddd8",
"_spec": "execa@^1.0.0",
"_where": "E:\\github\\setup-java\\node_modules\\husky",
"author": {
"name": "Sindre Sorhus",
"email": "sindresorhus@gmail.com",
"url": "sindresorhus.com"
},
"bugs": {
"url": "https://github.com/sindresorhus/execa/issues"
},
"bundleDependencies": false,
"dependencies": {
"cross-spawn": "^6.0.0",
"get-stream": "^4.0.0",
"is-stream": "^1.1.0",
"npm-run-path": "^2.0.0",
"p-finally": "^1.0.0",
"signal-exit": "^3.0.0",
"strip-eof": "^1.0.0"
},
"deprecated": false,
"description": "A better `child_process`",
"devDependencies": {
"ava": "*",
"cat-names": "^1.0.2",
"coveralls": "^3.0.1",
"delay": "^3.0.0",
"is-running": "^2.0.0",
"nyc": "^13.0.1",
"tempfile": "^2.0.0",
"xo": "*"
},
"engines": {
"node": ">=6"
},
"files": [
"index.js",
"lib"
],
"homepage": "https://github.com/sindresorhus/execa#readme",
"keywords": [
"exec",
"child",
"process",
"execute",
"fork",
"execfile",
"spawn",
"file",
"shell",
"bin",
"binary",
"binaries",
"npm",
"path",
"local"
],
"license": "MIT",
"name": "execa",
"nyc": {
"reporter": [
"text",
"lcov"
],
"exclude": [
"**/fixtures/**",
"**/test.js",
"**/test/**"
]
},
"repository": {
"type": "git",
"url": "git+https://github.com/sindresorhus/execa.git"
},
"scripts": {
"test": "xo && nyc ava"
},
"version": "1.0.0"
}

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# execa [![Build Status: Linux](https://travis-ci.org/sindresorhus/execa.svg?branch=master)](https://travis-ci.org/sindresorhus/execa) [![Build status: Windows](https://ci.appveyor.com/api/projects/status/x5ajamxtjtt93cqv/branch/master?svg=true)](https://ci.appveyor.com/project/sindresorhus/execa/branch/master) [![Coverage Status](https://coveralls.io/repos/github/sindresorhus/execa/badge.svg?branch=master)](https://coveralls.io/github/sindresorhus/execa?branch=master)
> A better [`child_process`](https://nodejs.org/api/child_process.html)
## Why
- Promise interface.
- [Strips EOF](https://github.com/sindresorhus/strip-eof) from the output so you don't have to `stdout.trim()`.
- Supports [shebang](https://en.wikipedia.org/wiki/Shebang_(Unix)) binaries cross-platform.
- [Improved Windows support.](https://github.com/IndigoUnited/node-cross-spawn#why)
- Higher max buffer. 10 MB instead of 200 KB.
- [Executes locally installed binaries by name.](#preferlocal)
- [Cleans up spawned processes when the parent process dies.](#cleanup)
## Install
```
$ npm install execa
```
<a href="https://www.patreon.com/sindresorhus">
<img src="https://c5.patreon.com/external/logo/become_a_patron_button@2x.png" width="160">
</a>
## Usage
```js
const execa = require('execa');
(async () => {
const {stdout} = await execa('echo', ['unicorns']);
console.log(stdout);
//=> 'unicorns'
})();
```
Additional examples:
```js
const execa = require('execa');
(async () => {
// Pipe the child process stdout to the current stdout
execa('echo', ['unicorns']).stdout.pipe(process.stdout);
// Run a shell command
const {stdout} = await execa.shell('echo unicorns');
//=> 'unicorns'
// Catching an error
try {
await execa.shell('exit 3');
} catch (error) {
console.log(error);
/*
{
message: 'Command failed: /bin/sh -c exit 3'
killed: false,
code: 3,
signal: null,
cmd: '/bin/sh -c exit 3',
stdout: '',
stderr: '',
timedOut: false
}
*/
}
})();
// Catching an error with a sync method
try {
execa.shellSync('exit 3');
} catch (error) {
console.log(error);
/*
{
message: 'Command failed: /bin/sh -c exit 3'
code: 3,
signal: null,
cmd: '/bin/sh -c exit 3',
stdout: '',
stderr: '',
timedOut: false
}
*/
}
```
## API
### execa(file, [arguments], [options])
Execute a file.
Think of this as a mix of `child_process.execFile` and `child_process.spawn`.
Returns a [`child_process` instance](https://nodejs.org/api/child_process.html#child_process_class_childprocess), which is enhanced to also be a `Promise` for a result `Object` with `stdout` and `stderr` properties.
### execa.stdout(file, [arguments], [options])
Same as `execa()`, but returns only `stdout`.
### execa.stderr(file, [arguments], [options])
Same as `execa()`, but returns only `stderr`.
### execa.shell(command, [options])
Execute a command through the system shell. Prefer `execa()` whenever possible, as it's both faster and safer.
Returns a [`child_process` instance](https://nodejs.org/api/child_process.html#child_process_class_childprocess).
The `child_process` instance is enhanced to also be promise for a result object with `stdout` and `stderr` properties.
### execa.sync(file, [arguments], [options])
Execute a file synchronously.
Returns the same result object as [`child_process.spawnSync`](https://nodejs.org/api/child_process.html#child_process_child_process_spawnsync_command_args_options).
This method throws an `Error` if the command fails.
### execa.shellSync(file, [options])
Execute a command synchronously through the system shell.
Returns the same result object as [`child_process.spawnSync`](https://nodejs.org/api/child_process.html#child_process_child_process_spawnsync_command_args_options).
### options
Type: `Object`
#### cwd
Type: `string`<br>
Default: `process.cwd()`
Current working directory of the child process.
#### env
Type: `Object`<br>
Default: `process.env`
Environment key-value pairs. Extends automatically from `process.env`. Set `extendEnv` to `false` if you don't want this.
#### extendEnv
Type: `boolean`<br>
Default: `true`
Set to `false` if you don't want to extend the environment variables when providing the `env` property.
#### argv0
Type: `string`
Explicitly set the value of `argv[0]` sent to the child process. This will be set to `command` or `file` if not specified.
#### stdio
Type: `string[]` `string`<br>
Default: `pipe`
Child's [stdio](https://nodejs.org/api/child_process.html#child_process_options_stdio) configuration.
#### detached
Type: `boolean`
Prepare child to run independently of its parent process. Specific behavior [depends on the platform](https://nodejs.org/api/child_process.html#child_process_options_detached).
#### uid
Type: `number`
Sets the user identity of the process.
#### gid
Type: `number`
Sets the group identity of the process.
#### shell
Type: `boolean` `string`<br>
Default: `false`
If `true`, runs `command` inside of a shell. Uses `/bin/sh` on UNIX and `cmd.exe` on Windows. A different shell can be specified as a string. The shell should understand the `-c` switch on UNIX or `/d /s /c` on Windows.
#### stripEof
Type: `boolean`<br>
Default: `true`
[Strip EOF](https://github.com/sindresorhus/strip-eof) (last newline) from the output.
#### preferLocal
Type: `boolean`<br>
Default: `true`
Prefer locally installed binaries when looking for a binary to execute.<br>
If you `$ npm install foo`, you can then `execa('foo')`.
#### localDir
Type: `string`<br>
Default: `process.cwd()`
Preferred path to find locally installed binaries in (use with `preferLocal`).
#### input
Type: `string` `Buffer` `stream.Readable`
Write some input to the `stdin` of your binary.<br>
Streams are not allowed when using the synchronous methods.
#### reject
Type: `boolean`<br>
Default: `true`
Setting this to `false` resolves the promise with the error instead of rejecting it.
#### cleanup
Type: `boolean`<br>
Default: `true`
Keep track of the spawned process and `kill` it when the parent process exits.
#### encoding
Type: `string`<br>
Default: `utf8`
Specify the character encoding used to decode the `stdout` and `stderr` output.
#### timeout
Type: `number`<br>
Default: `0`
If timeout is greater than `0`, the parent will send the signal identified by the `killSignal` property (the default is `SIGTERM`) if the child runs longer than timeout milliseconds.
#### buffer
Type: `boolean`<br>
Default: `true`
Buffer the output from the spawned process. When buffering is disabled you must consume the output of the `stdout` and `stderr` streams because the promise will not be resolved/rejected until they have completed.
#### maxBuffer
Type: `number`<br>
Default: `10000000` (10MB)
Largest amount of data in bytes allowed on `stdout` or `stderr`.
#### killSignal
Type: `string` `number`<br>
Default: `SIGTERM`
Signal value to be used when the spawned process will be killed.
#### stdin
Type: `string` `number` `Stream` `undefined` `null`<br>
Default: `pipe`
Same options as [`stdio`](https://nodejs.org/dist/latest-v6.x/docs/api/child_process.html#child_process_options_stdio).
#### stdout
Type: `string` `number` `Stream` `undefined` `null`<br>
Default: `pipe`
Same options as [`stdio`](https://nodejs.org/dist/latest-v6.x/docs/api/child_process.html#child_process_options_stdio).
#### stderr
Type: `string` `number` `Stream` `undefined` `null`<br>
Default: `pipe`
Same options as [`stdio`](https://nodejs.org/dist/latest-v6.x/docs/api/child_process.html#child_process_options_stdio).
#### windowsVerbatimArguments
Type: `boolean`<br>
Default: `false`
If `true`, no quoting or escaping of arguments is done on Windows. Ignored on other platforms. This is set to `true` automatically when the `shell` option is `true`.
## Tips
### Save and pipe output from a child process
Let's say you want to show the output of a child process in real-time while also saving it to a variable.
```js
const execa = require('execa');
const getStream = require('get-stream');
const stream = execa('echo', ['foo']).stdout;
stream.pipe(process.stdout);
getStream(stream).then(value => {
console.log('child output:', value);
});
```
## License
MIT © [Sindre Sorhus](https://sindresorhus.com)